body {
    font-family: '微软雅黑';
    font-size: 14px;
    margin: 0;
}

h1 {
    text-align: center;
    font-size: 18px;
    margin: 0;
}

a {
    text-decoration: none;
}

button {
    background-color: #3AC3DB;
    /* border: 1px solid black; */
    border: none;
    margin: 0;
    font-size: 14px;
}